c# - ASP.Net GridView - Show the last 4 digits -


in gridview, have column need masked last 4-digits. gridview:

<asp:gridview id="gridview" runat="server" autogeneratecolumns="false" borderstyle="none" borderwidth="1px" cellpadding="3" datakeynames="br_id" datasourceid="sqldatasource6">                 <columns>                     <asp:boundfield datafield="accountnumber" headertext="account number" sortexpression="accountnumber" />                 </columns> </asp:gridview>

i tried right function of sql server in sqldatasource, 

`select '****-****-****' + right (accountnumber, 4)` from....

the issue is, when hit edit, , save in gridview, save in database, example: ****-****-****-1234

return 4 digits database. update the account number in database if edit account number.

if users need able see full account number defeats purpose of masking in first place.


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